Pattern mechanism for looms.



H. A. OWEN '6: A. K. PRATT.

PATTERN MECHANISM FOR LOOMS.

APPLIGA TION FILED snr'r. 28. 1906.

939,299. Patented'Nov. 9, 1909.

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PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. 28, 1906.

Patented Nov. 9, 1909.

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A ttest H. A. OWEN & A. K. PRATT. PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. 23, 1906 939,299, I Patented'Nov. 9, 1909.

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mnnzw. a. GR-uuu 00,. PMow-umocmpuzns. \NISHINGYON n c UNITED STATESTATEN T OFFICE.

HENRY A. OWEN-AND ALBERT K. PnATT, oTwHITiitsviLLE', MASSACHUSETTS, As-

srenons To THE WHITIN MACHINE woRKs-oFwHITINsvILLn, MASSACHUSETTS,

A CORPORATION OF MASSACHUSETTS.

PATTERN MECHANISM FOB LOOMS.

- nection with the accompanying drawings,

is a full, clear, and concise specification.

Our invention relates to pattern mechanisms of looms which employshifting shuttle boxes in conjunction with the usual shedforming patternmechanism and consists in the arrangement and relative disposition ofthe several parts, hereinafter described, whereby a single set ofpattern controlling elements and single operating means therefor may beeffectively employed for controlling both the filling and the warppatterns.

More especiallythe invention consists in adapting certain of theelements of the ordinary dobby of pattern looms for controlling thedrop-box motion, which enables such looms to be made with all theadvantages of looms having separate drop-box patternmechanisms withoutthe disadvantage and expense of their more complicated construction.

Another object of the invention is furthermore to produce such a form ofduplex c011- trol which is simple in; operation and construction andwhich can be applied without material alteration, to existing looms.

In the drawings filed herewith only so much of the ordinary loom dobbyis exhibited as is necessary to illustrate the practical application ofour invention.

Figure 1 is a view in elevation of the dobby end of a pattern loom,parts of the pattern chain and chain drum being broken away toillustrate interior construction. Fig. 2 is a side elevation of Fig. 1,with parts of the dobby frame broken out; and Fig. 8 is an enlargeddetail of the pattern chain and associated parts.

The general construction of the apparatus shown in the drawing will berecognized by those familiar in this art.

A represents the loom frame and B represents the lay thereof operated inthe usual manner by the crank-shaft G. Y

The shifting shuttle boxes (not shown in Specification of LettersPatent.

Appl icaqon filed September 28, 1906.

Patented Nov. 9, 1909.

Serial No. 336,559.

the drawings), which carry vthe different fillings to be woven into thecloth, are mounted in-the usual way upon the rod D which travels backand forth in unison with the lay, and the adjustment or, shifting of theboxes under the call of the pattern, is effected by the drop-box motionindicated generally by E. This mechanism is connected with the powershaft of the loom and is only called into operation when a change in thefilling is desired, at which time it is coupled to its driving elementto effect the change.

. The loom dobby, attached as usual to the end of the frameA atits upperpart, comprises two side-frames F, F, between'which are mounteda seriesof pattern controlling levers G, G, the ack-leversH carr1ed-there-,

by, the jack'hooks H pivotedon'the ends of the levers,the indicatorlevers H andalsothe pattern chain-I :which'is carried upon its.-

usual chain-drumbythe cross-shaft I j ournaled in the lower part of thedobby frame.

The shaft I is driven through the instrumentality of a slip clutch I bya worm. gear.

P, which latter meshes with a worm I driven by sprocket chain connectionand gear I from the crankshaft C. On the opposite end of the patternchainv shaft there is a hand wheel I by means of which said shaft andconsequently the positionof the patternchain, may be adjustedindependently of its actuation-by the worm gear'lfl-the said gearslipping on the clutch I during such adjustment. The pattern levers Gare selectively operated in accordance with the arrangement of the pegsor protuberances on the pattern chain in well understood manner, throughthe instrumentality of the jack levers and hooks which are raised andlowered by the indicator levers H into and out of connection with thereciprocating knife bars J, J, these knife bars being reciprocated inthe slots F of the frames F by means of the usual actuator arms J, J andconnections J on the outside of the frames, which arms are carried uponthe rock-shaft J and operated by the connecting rod J from the gear I".

The parts above described are the usual parts of the dobby of familiarconstruction and have the same principle of operation.

In accordance with our present invention,

of protuberances for controlling both the drop-box motion and the shed=forming mechanism. Preferably the protuberances which control thedrop-box motion are located on the side of the chain which is toward therear of the loom or adjacent the driving gear 1*. Themajor part of thelevers, such as G, are constructed the same as ordinary harness levers,being mounted on a common fulcrum or cross-shaft G of the dobby frameand connected at their upper ends with the cords G which operate theharnesses of shed-forming mechanism in well understood manner. Thelevers G, Gr which correspond in position with the filling patternprotuberances on the pattern chain are similar to the shed-forminglevers Gr, being also adapted to actuate harnesses if desired, but have,in addition, depending arms G on the opposite or lower side of thefulcrum which are adapted to be connected with the drop-box motion E forproducing shift of the boxes when operated. As shown in the drawings thedepending arms G are offset toward the front of the machine and have camengagement respectively with two lifter levers K, K, mounted side byside on bracket L, and respectively connected through suitable springswith the lifting rods K K and the latter, when operated, serve'toshiftthe mutilated pinions of the drop-box motion E, by means of therockshaft K and connected-links and cranks in the same manner as thesaid pinions are ordinarily shifted in looms having special dropboXpattern motions. The depending arms G are provided with rollers toreduce the friction between the same and the lifter levers K K, the camengagement of the arms with the levers being produced by the curve ofthe upper surface of the latter engaged by the rollers so as to rock thesaid levers on the fulcrums. But it will be understood that other formsof controlling means betweenth pattern controlling levers and thedrop-box motion E may be employed with equal effect.

The pattern which is to be woven in a loom constructed as abovedescribed, de pends for both warp and filling on the pegging of a singlechain which is manifestly easy to ad ust and attend, and in the case ofa mis-pick there is no possibility of a confusion of the patterns whenthe chain has to be turned backward. The arrangement of the severalpattern controlling levers in one frame and operated by a single trainof gearing facilitates the cleaning and inspection of the machine andmakes the pattion, in combination with means for selectively andsimilarly operating all of said chain shaft with means for manually andindependently rotating the same and a single pattern chain carried bysaid shaft between the aforesaid side-frames.

In testimony whereof, we have signed our names to the specification inthe presence of two subscribing witnesses.

I HENRY A. OWEN.

ALBERT K. PRATT. Witnesses:

HARMON O, NELSON, OSCAR L. OWEN.

levers comprising a clutch-driven patternv

